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序言:互联网产生之初主要是为军事、教育、科研服务,因 此IPv4地址作为重要的互联网资源在早期并没有得到大众的重视。但 是随着20世纪90年代后期全球互联网商业化进程的快速发展,IPv4地 址资源分配不均及地址资源匮乏的问题日益显露。如美国有3亿人口, 1．7亿户互联网用户,拥有的IPv4地址相当于75个A类地址;中国拥 有13亿人口,1亿多户互联网用户,却只有5000多万个IPv4地址,仅 相当于3个A类地址。随着全球其他一些发展中国家互联网的发展, 这些国家很多都将面临着与中国类似的IPv4地址匮乏的问题,而且 这种IPv4地址资源分配不平衡的状况已经很难改变。 IPv6的出现让我们看到了解决这个问题的希望所在,鉴于IPv6有 许多IPv4无可比拟的优越特性,很多发达国家的IPv6发展已经起步, 中国等少数发展中国家也已经开始推进IPv6的发展。尤其是2004年 以来,随着IPv6在全球的一些国家和地区步入快速发展期,IPv6的 发展出现了一些新的动向。本期IPv6的专题不仅详细介绍了中国 IPv6的进展,还向读者展示了各国正在推出和将要推出的特色应用, 以及各国在IPv6领域方面的积极探索。
Preamble: The beginning of the Internet was mainly for the military, education, research services, so the IPv4 address as an important Internet resources in the early did not get the public’s attention. However, with the rapid development of the global Internet commercialization in the late 1990s, the problem of uneven allocation of IPv4 address resources and lack of address resources has become increasingly evident. For example, in the United States, with 300 million people and 170 million Internet users, it has an IPv4 address equivalent to 75 Class A addresses. China has a population of 1.3 billion and more than 100 million Internet users, but only has more than 50 million IPv4 addresses. Only Equivalent to three Class A addresses. With the development of the Internet in other developing countries around the world, many of these countries will face the problem of lack of IPv4 addresses similar to those in China. Moreover, the imbalance in the allocation of IPv4 addresses has been difficult to change. The emergence of IPv6 shows us the hope of resolving this problem. Given that IPv6 has many incomparable advantages of IPv4, IPv6 development in many developed countries has started. A few developing countries such as China have also begun to promote the development of IPv6. Especially since 2004, with the rapid development of IPv6 in some countries and regions in the world, there have been some new developments in the development of IPv6. This issue of IPv6 not only details the progress of IPv6 in China, but also shows the readers the features and applications that are being introduced and will be launched in various countries and the active exploration of IPv6 in various countries.